# Voltage to current conversion for coils:
#   coil 1: 1.097 kOhm
#   coil 2: 1.106 kOhm
# drive voltage / V, frequency (coil 1) / Hz, frequency (coil 2) / Hz
-10,  155.82,  87.49
 -9,  151.88,  86.79
 -8,  148.32,  87.13
 -7,  144.78,  89.67
 -6,  141.75,  94.38
 -5,  138.98, 101.54
 -4,  137.00, 108.46
 -3,  135.72, 116.57
 -2,  135.29, 123.84
 -1,  136.00, 130.76
  0,  137.72, 137.72
  1,  140.37, 144.47
  2,  144.15, 150.77
  3,  148.34, 156.90
  4,  152.84, 162.81
  5,  157.67, 168.47
  6,  162.43, 174.28
  7,  167.54, 179.53
  8,  172.25, 184.79
  9,  177.27, 189.65
 10,  182.17, 194.26